Multiple Choice
In simplified terms using relative masses (with the proton as the reference), what is the relative mass of a proton?
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4. Atoms and Elements
Subatomic Particles (Simplified)
Multiple Choice
In simplified atomic structure, what is the approximate mass of a neutron in atomic mass units (amu)?
A
amu
B
amu
C
amu
D
amu
Verified step by step guidance1
Understand that atomic mass units (amu) are a standard unit used to express atomic and molecular masses, where 1 amu is defined as one twelfth the mass of a carbon-12 atom.
Recall that the neutron is a subatomic particle found in the nucleus of an atom, along with protons.
Know that the mass of a neutron is very close to that of a proton, and both are approximately 1 amu.
Recognize that electrons have a much smaller mass (about 0.00055 amu), so their contribution to atomic mass is negligible compared to protons and neutrons.
Therefore, the approximate mass of a neutron in atomic mass units is about 1 amu.
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